entomologist professor Zoologist
He was assigned as professor of zoology at the University of Oslo from 1959. Among his early works were studies of the nervous system and endocrine system of insects. He edited the six volume encyclopedia Cappelens Dyreleksikon, published 1979–1981.
In 1995 he published the book Fem år for fred og frihet medical Milorg 1940–1945.
Royal Swedish Academy of Sciences]
During the occupation of Norway by Nazi Germany he was a central member of Milorg, being a courier for leader Jens Christian Hauge. He was a member of the board of Norway"s Resistance Museum from 1973.